Uber, Taxis Engage in French Street Fight

Online Car Services to Oppose New Rule on Pickup Times

PARIS—Online car-service companies including Uber Technologies Inc. plan to challenge a new French regulation that slows how quickly they can pick up passengers, escalating a battle over apps that are upending the traditional taxi business.

California-based Uber and French competitors including Chauffeur-Prive.com and Allocab.com said Monday that they are planning an appeal to France's Conseil d'Etat, the country's highest...